From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sender4-pp-o94.zoho.com (sender4-pp-o94.zoho.com [136.143.188.94]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1424845DF6B; Thu, 30 Jul 2026 18:53:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.94 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785437596; cv=pass; b=uao6lolqHArHw2BOCVi1m59pGx35+yEbwH+PY4B8kHE2xjotqDqgxO+ljmeBHWwUWsT13IxcOEaaj+uEH+Rn8HV7u4mhz8gDQMvaq2qYyWMhTKmXXb6KzBS/jqAV0jCR/5z1wT9PYg258/BNQUMZPX5cLlaQ7BFuGmI+ftKyHaM= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785437596; c=relaxed/simple; bh=CGvopS6JOUbal9KDon1u//lgErfi67LyWPVx922B7AY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ge2dgsg3O7x5It9OWK+OBWG1mFGAkCthJxNMIKw55It2nYnP6xqCgIAy57G5FED4Ap7O8LSGwLFBxAHre0TkcZpRZ6ljbP3tbasUPwE5E+y4683S1sezWb/zsyeYZ6HY1lNlxyClNOjaTn1TX4AGdcb4Ju6k/5q+hjlFnYtqFtQ= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=zohomail.com; spf=pass smtp.mailfrom=zohomail.com; dkim=pass (1024-bit key) header.d=zohomail.com header.i=mhklkml@zohomail.com header.b=em2PmNGC; arc=pass smtp.client-ip=136.143.188.94 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=zohomail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=zohomail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=zohomail.com header.i=mhklkml@zohomail.com header.b="em2PmNGC" ARC-Seal: i=1; a=rsa-sha256; t=1785437366; cv=none; d=zohomail.com; s=zohoarc; b=PjO5kBFHiiYlmV/0S9Q0Pvpzp80391vSvE9eGtIdntCWHArkReht9GDAWPGslATNz+Rd0RMnX7+blzpgro1Z59NSLF8yEGNBOYbJKYomQ0PVdgqjbZZpOeIAfy3XWe/F9mJy8NRutFDEBTPxOtBSofRE4SWBrCa2zd2s523M0Mw= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1785437366; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:Reply-To:Reply-To:Subject:Subject:To:To:Message-Id; bh=D1iXUduacavCGEitAokduVy/I/jHKpVpXbrJUfFhNic=; b=Bun8hTzaGLb1hAt5StLryPIFcojWkz1/OSw55K0I09ecx8wtGVuHFwdgPXowa7nZVztOARuJqJH89gopWbjUXLCqmuvRx2AuLbW9Qs5/blj8SynIrxRLTf5lTpKsLouAiIzs0gTlwnkW29WYCV6iozkZNIzZboyUmO6inxr5op8= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=zohomail.com; spf=pass smtp.mailfrom=mhklkml@zohomail.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1785437365; s=zm2022; d=zohomail.com; i=mhklkml@zohomail.com; h=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-Id:Message-Id:In-Reply-To:Reply-To:Reply-To:MIME-Version:Content-Transfer-Encoding:Feedback-ID; bh=D1iXUduacavCGEitAokduVy/I/jHKpVpXbrJUfFhNic=; b=em2PmNGCVeRXz6c3ALwQFn54CwNw+wDME/pKV0ZG00eNZ9KyCtRQSL7OHQDfkHBZ X2WONVshJsmkT1FAtZlYy/p+tCdTietbFtBCz5ajfuy3bPihD9hNL8lmo4NZzBICJjD ovyYF71mlViKFsaaY9YkoUR86NiXJSBTm+Qe4bb0= Received: by mx.zohomail.com with SMTPS id 1785437363012321.6515457198867; Thu, 30 Jul 2026 11:49:23 -0700 (PDT) From: Michael Kelley To: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, longli@microsoft.com, tglx@kernel.org, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, daniel.lezcano@kernel.org, ssengar@linux.microsoft.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, James.Bottomley@HansenPartnership.com, martin.petersen@oracle.com, sgarzare@redhat.com, horms@kernel.org Cc: x86@kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, netdev@vger.kernel.org, linux-scsi@vger.kernel.org, virtualization@lists.linux.dev Subject: [PATCH 4/6] drm_hyperv: Remove support for synth video protocol of old Hyper-V hosts Date: Thu, 30 Jul 2026 11:48:44 -0700 Message-Id: <20260730184846.3165-5-mhklkml@zohomail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260730184846.3165-1-mhklkml@zohomail.com> References: <20260730184846.3165-1-mhklkml@zohomail.com> Reply-To: mhklinux@outlook.com Precedence: bulk X-Mailing-List: linux-hyperv@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Feedback-ID: zu0801122792ec40954e1386a7e9e812fb0000c67bd15f9101f62001a8617fd5a1bc3895c5d728d00dade6db:ZohoMail X-Zoho-CM-AccountID: 0c88436b239415d28725328898ceccb9ce2ba3b61598c1c37bcb2109e0248174 X-ZohoMailClient: External From: Michael Kelley With the overall removal of Linux support for running on Hyper-V hosts earlier than WS2016 and Windows 10, it's no longer necessary to support older synthetic video protocols. Remove the support. Signed-off-by: Michael Kelley --- drivers/gpu/drm/hyperv/hyperv_drm_proto.c | 33 +++++++---------------- 1 file changed, 10 insertions(+), 23 deletions(-) diff --git a/drivers/gpu/drm/hyperv/hyperv_drm_proto.c b/drivers/gpu/drm/hyperv/hyperv_drm_proto.c index f0ef627b4898..cea1ea2595cd 100644 --- a/drivers/gpu/drm/hyperv/hyperv_drm_proto.c +++ b/drivers/gpu/drm/hyperv/hyperv_drm_proto.c @@ -17,7 +17,7 @@ #define SYNTHVID_VER_GET_MAJOR(ver) (ver & 0x0000ffff) #define SYNTHVID_VER_GET_MINOR(ver) ((ver & 0xffff0000) >> 16) -/* Support for VERSION_WIN7 is removed. #define is retained for reference. */ +/* Support for WIN7 and WIN8 is removed. #define's retained for reference. */ #define SYNTHVID_VERSION_WIN7 SYNTHVID_VERSION(3, 0) #define SYNTHVID_VERSION_WIN8 SYNTHVID_VERSION(3, 2) #define SYNTHVID_VERSION_WIN10 SYNTHVID_VERSION(3, 5) @@ -557,23 +557,12 @@ int hv_drm_connect_vsp(struct hv_device *hdev) return ret; } - /* Negotiate the protocol version with host */ - switch (vmbus_proto_version) { - case VERSION_WIN10: - case VERSION_WIN10_V5: - ret = hv_drm_negotiate_version(hdev, SYNTHVID_VERSION_WIN10); - if (!ret) - break; - fallthrough; - case VERSION_WIN8: - case VERSION_WIN8_1: - ret = hv_drm_negotiate_version(hdev, SYNTHVID_VERSION_WIN8); - break; - default: - ret = hv_drm_negotiate_version(hdev, SYNTHVID_VERSION_WIN10); - break; - } - + /* + * Negotiate the protocol version with host. Since support for hosts + * older than WIN10 has been removed from Linux, only negotiate the + * WIN10 version. + */ + ret = hv_drm_negotiate_version(hdev, SYNTHVID_VERSION_WIN10); if (ret) { drm_err(dev, "Synthetic video device version not accepted %d\n", ret); goto error; @@ -581,11 +570,9 @@ int hv_drm_connect_vsp(struct hv_device *hdev) hv->screen_depth = SYNTHVID_DEPTH_WIN8; - if (hv_drm_version_ge(hv->synthvid_version, SYNTHVID_VERSION_WIN10)) { - ret = hv_drm_get_supported_resolution(hdev); - if (ret) - drm_err(dev, "Failed to get supported resolution from host, use default\n"); - } + ret = hv_drm_get_supported_resolution(hdev); + if (ret) + drm_err(dev, "Failed to get supported resolution from host, use default\n"); if (!hv->screen_width_max) { hv->screen_width_max = SYNTHVID_WIDTH_WIN8; -- 2.25.1